Wednesday

April 16, 2014

April 16, 2014

Number of results: 2,032

**MATH**

regular rate = r discount rate = (r-5) number bought = n number that would have been bought = (n+1) so 210 = r n and 210 = (r-5)(n+1) = r n + r - 5 n -5 from the first equation r = 210/n then the second 215 = (210/n)n +210/n -5 n 5 = 210/n -5 n 5 n = 210 -5 n^2 n^2 + n - 42 = ...
*Thursday, September 25, 2008 at 9:05am by Damon*

**Data management**

A),B),C) It's like finding the number of ways to arrange 4 1's and 7-0's. The number of ways is given by (m+n)!/(m!n!) Experiment first with a grid of 2x2, and then a 2x3. 2. (n-r)!/(n-r+1)! =(1.2.3...n-r)/(1.2.3...(n-r).(n-r+1)) =1/(n-r+1) 3. similarly, (n+2)!/(n-1)! = 210 (1...
*Thursday, October 27, 2011 at 6:50pm by MathMate*

**math**

Let V be the actual speed, not the 5 km/h faster speed. Let T be the travel time (in hours) to go 210 km at speed V. You can write two equations. V*T = 210 (V+5)(T-1) = 210 (V + 5)[(210/V) - 1] = 210 That can be converted to a quadratic equation, but I am going to try some ...
*Saturday, December 3, 2011 at 1:35am by drwls*

**Math**

.7 * 300 = 210 85 + 60 + x = 210 x = 210 - 145 x = 65
*Thursday, February 13, 2014 at 7:56pm by Ms. Sue*

**math**

2/7 = 60/210 1/5 = 42/210 1/6 = 35/210 ORDER: 2/7, 1/5, and 1/6.
*Sunday, December 12, 2010 at 8:53pm by Henry*

**Algebra**

Rate of 2nd cyclist = X mi/h. Rate of 1st cyclist = (x+10) mi/h. Eq1: d2 = Xt = 210mi. X = 210 / t. Eq2: d1 = (X+10)(t-2.4) = 210mi. In Eq2, substitute 210/t for X: (210/t+10)(t-2.4) = 210, 210-504/t+10t-24 = 210, -504/t+10t-24 = 210-210, -504/t+10t-24 = 0, Multiply both sides...
*Monday, April 18, 2011 at 3:02pm by Henry*

**Math (Algebra)**

N^3−6 is zero Modulo (N-6). If we compute Modulo (N-6) then obviously: N-6 = 0 -----> N = 6 Here and in the following the equals sign means equality modulo N - 6. We then have: N^3 -6 = 6^3 - 6 = 210 Therefore: 210 = 0 Reverting back to the ordinary definition of the ...
*Friday, June 28, 2013 at 9:55am by Count Iblis*

**Math**

Find the components of the unit vector that makes an angle of 210 degrees counterclockwise with the positive x-axis (-√3/2,-1/2) which would be the same as (cos 210º,sin 210º)
*Monday, April 16, 2007 at 2:18pm by Alejandro*

**Calculus**

let the equation be y = a(x-4)(x-5)(x+6) f(1) = -210 -210 = a(-3)(-4)(7) a = -210/84 = -5/2 f(x) = (-5/2)(x-4)(x-5)(x+6)
*Monday, September 6, 2010 at 11:36am by Reiny*

**math**

(1 2/5)x = 210 x = 210 / (7/5) x = 210 * (5/7) X = 150
*Tuesday, March 12, 2013 at 10:01am by Ms. Sue*

**Math**

All we need is one counterexample to show it is not an identity. let x = 210º LS = sin 210 = -1/2 RS = √(1- cos^2 (210º)) = √(.25) = 1/2 So there!
*Saturday, November 7, 2009 at 10:19pm by Reiny*

**physics**

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r 2
*Friday, January 14, 2011 at 11:20am by Marty *

**Physics**

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r
*Sunday, January 16, 2011 at 3:50pm by Bobby*

**Physics**

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r
*Sunday, January 16, 2011 at 5:10pm by Lucy*

**Nuclear Physics**

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r 2
*Thursday, January 13, 2011 at 2:24pm by Marty *

**Nuclear Physics**

If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r2
*Sunday, January 16, 2011 at 6:36pm by Jake*

**ALG 2**

Taking a look at the previous posting plug your values into row 10 of Pascal's triangle: 1 10 45 120 210 252 210 120 45 10 1 Watch out, because the terms involve x^2 and not just x: (x^2)^10 + 10(x^2)^9 y + ... The 5th term is 210(x^2)^6y^4 = 210 x^12 y^4
*Saturday, January 21, 2012 at 6:42pm by Steve*

**12**

Let the number of $2 increases be n Now: number of rooms = 210 cost per room = 45 cost of cleaning= 210(5) After increase: number of rooms = 210 - 3n cost per room = 45 + 2n cost of cleaning = 5(210-3n) profits = (210-3n)(45+2n) - 5(210-3n) = ... expand the above, then express...
*Tuesday, November 3, 2009 at 12:43am by Reiny*

**Algebra**

P = Po + I = 600. Po + 210 = 600 Po = 600 - 210 = $390. I = Po*r*t = $210. 390*r*5 = 210 1950r = 210 r = 0.1077 = 10.8 %.
*Tuesday, August 28, 2012 at 6:08pm by Henry*

**Math**

A) .98(210) and .98(240) B) (210)(240) (.98)(210)(.98)(240) Percent decrease = diff in your two answer/ original (210)(240)
*Sunday, December 16, 2012 at 11:48pm by Mac*

**math repost**

1/sin^2 210 well 210 is 180 + 30 so it is 30 degrees below the y axis in quadrant 3 sin 210 = -1/2 1/(-1/2)^2 = 4 That should get you started
*Thursday, February 11, 2010 at 4:16pm by Damon*

**Math**

" If you subtract 5 from it, the result is divisible by 5" ----> number could be 5,10,15,20.... " If you subtract 6 from it, the result is divisible by 6 " ---> number could be 6, 12, 18 , ... " if you subtract 7 from it, the result is divisible by 7" ---> number ...
*Sunday, September 26, 2010 at 9:57am by Reiny*

**physics**

friction work= 6N*35M=210joules. finalKE= initialKE-210 1/2 m vf^2=1/2 m vi^2-210 Vf^2= vi^2-2*210 vi= 7 m/s
*Monday, December 6, 2010 at 5:16pm by bobpursley*

**Physical Science**

1. Which equation correctly shows beta decay? (A) 210/82 Pb -> 209/81 Tl + 0/-1 e + y (B) 210/82 Pb -> 209/83 Bi + 0/-1 e + y (C) 210/82 Pb -> 210/83 Tl + 0/-1 e + y (D) 210/82 Pb -> 210/83 Bi + y (E) 210/82 Pb -> 210/83 Bi + 0/-1 e + y 2. The half-life if radon...
*Monday, November 18, 2013 at 2:27pm by CJ*

**math**

they both drove the same time, t hrs so 60t + 80t = 210 140t = 210 t = 210/140 = 1.5 after 1.5 hrs, they met. and that time was 9:20 + 1:30 = 10:50 pm distance traveled by car = 1.5(80) = 120 km
*Wednesday, February 13, 2013 at 8:13pm by Reiny*

**Math**

Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams. WHich two masses produce this answer? 1) 210.10 g+235.100g 2)210.100 g + 235.10 g 3) 210.1 g + 235.1 g 4) 210.10 g+ 235.10 g I think the answer is 2 but I don't know the reason why.
*Thursday, November 6, 2008 at 10:21pm by Joanne*

**math**

let x = amount of money of Lexi let 250 - x = amount of amount of Marie then set up the equation: x - (2/5)x = 250 - x - 40 (3/5)x = 210 - x (3/5)x + x = 210 (8/5)x = 210 x = 210*(5/8) x = $ 131.25 (Lexi's money) 250 - x = 118.75 (Marie's money) hope this helps~ :)
*Friday, October 21, 2011 at 9:12pm by Jai*

**trig**

Can you visualize angles better in degrees? most students can, so 7π/3 = 7(6-°) = 210° 210° is in quadr III the reference angle is 30° ( we are 30° from the x-axis) I know cos 30° = √3/2 in III, the cosine, and thus the secant, is negative sec (7π/3) = sec 210...
*Tuesday, January 17, 2012 at 5:27pm by Reiny*

**maths**

Suppose he had Rs x at the start After spending 12.5% or .125 of that he has .875x left He spends 70% of that, so he has 30% of the .875x or .3(.875x) left but .3(.875x) = 210 .2625x = 210 x = 210/.2625 = 800
*Wednesday, October 21, 2009 at 6:22am by Reiny*

**math **

so we have 210 men and 90 women, Must choose 3 a) (90/300)(89/299)(88/298) = .026370 or C(90,3)/C(300,3) = .026370 b) so you want permutations of WWM = 3(90/300)(89/299)(210/298) = .188784 or C(90,2)C(210,1)/C(300,3) = .188784 c) short way: C(90,1)C(210,2)/C(300,3) = ..... d) ...
*Tuesday, June 22, 2010 at 10:37pm by Reiny*

**Math**

let x be the rate(speed) TABLE: R * T = D M1 x 3 = 3x M2 x+10 3 = 3(x+10) solution: 3x+3(x+10)=210 (210, bcoz 230-20 or distance after 3hrs) 3x+3x+30=210 6x=180 x=30kph
*Wednesday, January 9, 2013 at 6:26am by HELP HELP HELP MNHS*

**Algebra**

F = G M1Me/r^2 210 = G Me M1/4000^2 W = G Me M1 /(4100^2 W/210 = 4000^2/4100^2 W = 210 (4*10^3)^2/(4.1*10^3)^2 W = 210 (16/16.81)
*Friday, April 29, 2011 at 5:56pm by Damon*

**mechanics of materials**

E=210 GPa (210 MPa isn’t correct) t=6 mm=6•10⁻³m R=6 m Maximum bending stress is σ(max) = E•t/2R=210•10⁹•6•10⁻³/2•6=105•10⁶ N/m²
*Monday, January 28, 2013 at 12:51pm by Elena*

**Algebra 1**

4200 / 20 = 210 1 inch = 210 feet
*Tuesday, October 15, 2013 at 6:05pm by Ms. Sue*

**MATH 2**

x+3x+2x=210 2x_3x=210
*Tuesday, July 27, 2010 at 9:33pm by edwitch dumerand*

**Intermediate Algebra**

I = E/R 42 = E/5 so E = 210 volts at R=5 ohms, I = 210/4 = 52.5 amps
*Sunday, December 9, 2012 at 11:11pm by Steve*

**IT/210**

But what is the School Subject? IT/210 does not tell me. Sra
*Wednesday, September 22, 2010 at 12:13am by SraJMcGin*

**algebra**

493.5 / 2.35 = 210 210/3 = ?
*Thursday, June 28, 2012 at 4:11pm by Ms. Sue*

**math**

line << = (4/10)(3/)(2/8)(1/7) = 1/210 >> should read = (4/10)(3/9)(2/8)(1/7) = 1/210 and it looks like a transposed the digits in the last line so prob = 1/210
*Thursday, April 9, 2009 at 11:49am by Reiny*

**Math**

PERIMETER=2(L+B) = 2(63+42) =210 TOTAL COST=210*32 =672
*Saturday, August 20, 2011 at 10:33pm by KOSURU.KARUNAKAR*

**physics**

solution,EK=1/2mv^2..210=1/2(2.1)v^2..square root 210/0.24=60.4J
*Thursday, March 21, 2013 at 1:58am by Jossie*

**Physical Science**

(E) 210/82 Pb -> 210/83 Bi + 0/-1 e + y (C) 49.6 grams
*Monday, November 18, 2013 at 2:27pm by Elena*

**math**

Which one(s) of these twelve brands would be considered outliers, if there are indeed any at all? How extreme does something have to be considered an outlier? Brand,Strawberry,Vanilla 1,140,140 2,210,230 3,200,170 4,200,180 5,110,100 6,180,180 7,210,150 8,140,150 9,150,150 10,...
*Thursday, November 14, 2013 at 5:25pm by valerie *

**trig**

how do you solve Fcos29(degree)-210.308-0.58Fsin29=0 Solving for F? F(cos269-.58sin29)=210.308 F= 210.308/(cos269-.58sin29)
*Wednesday, March 14, 2007 at 9:53pm by natash*

**psy 2PSY/210 Psychology and Health Problems10**

I need help with an assignment for psy 210 i need to write about PSY/210 Psychology and Health Problems 1400 words any help would be greatly appreciated
*Sunday, April 26, 2009 at 9:28pm by Shannon*

**math**

set 0 = -9.8t^2 - 10t + 210 use the quadratic formula, where a = -9.8 b = -10 c = 210 I got 4.14 seconds
*Monday, June 20, 2011 at 9:11pm by Reiny*

**Trig**

t = -7(pi)/6. -7(pi)/6 * 180/(pi) = -210 deg. -210 is 210 deg CW from the + x-axis and is in the 2nd quadrant. Ar = [-210] - 180, Ar = 210 - 180 = 30 deg. A = 180 - 30 = 150 DEG CW FROM +X AXIS.
*Tuesday, October 5, 2010 at 12:09am by Henry*

**Algebra**

so can you tell me if this is correct.... 4x – 5y = 14 -12x + 15y = -42 15(4x – 5y = 14) = 60x – 75y = 210 5(-12x +15y = -42) = -60x + 75y = -210 60x – 75y = 210 + -60x + 75y = -210 = 0 The equations are not independent therefore they have an infinite solution set.
*Saturday, April 25, 2009 at 11:50pm by Kim*

**Physics**

While standing on a frictionless ice surface, a 50 kg skater pushes against a wall with an average force of 150 N west for 0.210 s. Calculate the velocity of the skater at 0.210 s. This was what i did: m = 50 kg Fnet = 150 N t = 0.210 s Vf =? Fnet = ma Fnet/m = a 150 N/50 kg...
*Monday, March 28, 2011 at 5:08pm by bram*

**Math**

50+60+95=205 not 210 Further, the 60 Mil. people not working also aren't looking for work, so they would not be counted (at least in the American system), making the answer 0% which is imposable. If they were counted, the only ones you are looking at are them. SO... 205/60 = 3...
*Saturday, February 23, 2013 at 3:56pm by Ken*

**Pre Algebra**

75% increase over 100% is 175% Use direct proportion: 175% : 210 100% : ? Cross multiply to get: 100%*210/175% = 120 Check: 120*(100%+75%)=210, OK
*Tuesday, March 8, 2011 at 11:57pm by MathMate*

**Algebra 2**

210= 84/(R1/2+R1/3) Multiply both sides by the denominator, assuming that R1 ≠ 0: 210(R1/2+R1/3)=84 Now find the common denominator of 2 and 3 to get: 210(3R1+2R1)/6 = 84 Multiply both sides by 6/210 and simplify: 5R1 = 12/5 R1 = 12/25
*Wednesday, July 22, 2009 at 12:55am by MathMate*

**Math**

3x+5y+3(30)=1770 x=y 3x+5x=1680 x=210 210 adult 240 student
*Sunday, March 2, 2014 at 8:50pm by Java*

**math/probability**

You are choosing 4 from 10 or C(10,4) = 210 (why are you multiplying 210 by 4! ? then the order would be important. )
*Friday, July 30, 2010 at 8:35pm by Reiny*

**Math check**

No. How can you round 210 billion to 9 million? 210,029,000,000
*Wednesday, October 23, 2013 at 9:22pm by Ms. Sue*

**Math 208**

0.7 * 300 = 210 65 + 82 = 147 210 - 147 = ?
*Saturday, February 11, 2012 at 3:27pm by Ms. Sue*

**integrated math**

Suppose a laboratory has a 26 g sample of polonium-210. The half-life of polonium-210 is about 138 days.?
*Tuesday, January 15, 2013 at 11:22pm by sara*

**Science math**

Suppose a laboratory has a 38 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 1104 days? How much polonium is in the sample 1104 days later?
*Monday, January 7, 2013 at 2:57pm by Joshua*

**science**

Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days? How much polonium is in the sample 966 days later?
*Tuesday, March 19, 2013 at 12:19pm by Anonymous*

**sciencemath**

Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days? How much polonium is in the sample 966 days later?
*Tuesday, March 19, 2013 at 12:19pm by Anonymous*

**chemistry**

210 210 Pb --> Bi + ? 82 83 60 0 Co --> ? + e 27 -1 I need an explanation on how to find the missing product.
*Wednesday, April 6, 2011 at 10:24pm by andrew*

**advanced math**

If 0°<= 360°, solve the equation, sec x=-2 a. 150° and 210 ° b. 210° and 330° c. 120° and 240° d. 240° and 300° I believe it is C. am i right?
*Thursday, May 28, 2009 at 4:11pm by sophie*

**7th grade math Ms. Sue please help I have no idea!**

actually i got #12 its 6/3 = 70/h 6 x h = 3 x 70 6h = 210 6 ÷ 6 = 210 ÷ 6 h = 35
*Monday, November 5, 2012 at 10:19pm by Savannah*

**Physics**

-195.8 deg C = nitrogen boils -210 deg C = nitrogen melts so 0 to 100 X is -210 C to -195.6 C 14.4 deg C is 100 X so change of 1 deg C is change of 6.94 X relation is linear X = k C + b we already know the slope k = 6.94 X = 6.94 C + b when C = -210, X = 0 0 = 6.94 (-210) + b ...
*Tuesday, January 14, 2014 at 5:28pm by Damon*

**math**

X = the total # of t-shirts. 3x/7 = the # of red t-shirts. x/3 = the # of blue t-shirts. (3x/7-20)=The # of blue t-shirts,also. x/3 = 3x/7 - 20, x/3 - 3x/7 = -20, Multiply both sides by 21: 7x - 9x = -420, -2x = -420, X = 210. 3x/7 = 3*210 / 7 = 90 Red t-shirts. x/3 = 210 / 3...
*Sunday, September 18, 2011 at 2:23pm by Henry*

**algebra2**

CD: $X Savings: $4X Mutual: $(15,000-5X) 0.02X + 0.01*4X + 0.1(15000-5x) = 210 0.06X + 1500 - 0.5X = 210 -0.44X = 210-1500 = -1290 X = 2931.82 4X = 4*2931.82 = $11,727.27 = Savings.
*Monday, November 18, 2013 at 11:59am by Henry *

**physics**

time 34.9+12.8+50.4+18.8=116.9/60=19.483hrs distance 76.5+96.7+37.7=210.9 210.9km/1.1083hrs=190.2914km/h ?????? done it so many times am so confuse!!!
*Tuesday, September 13, 2011 at 6:28am by Anonymous*

**math plzzzzzzz help **

perimeter=2*5feet3inch + 2*3feet6inch =17feet6inch (1feet=12inch) total inches = 17*12+6 = 210 inches 210*0.32=67.20
*Thursday, July 7, 2011 at 8:43pm by jnani*

**math plzzzzzzz help **

perimeter=2*5feet3inch + 2*3feet6inch =17feet6inch (1feet=12inch) total inches = 17*12+6 = 210 inches 210*0.32=67.20
*Thursday, July 7, 2011 at 8:43pm by jnani*

**math algebra**

the distance between the trains grows at 115+95 = 210 mi/hr So, it will take 504/210 hours to get 504 miles apart.
*Thursday, February 27, 2014 at 8:58pm by Steve*

**statistics**

if a test has a mean of 150 and a standard deviation of 30, we know that: a)50% of the respondents scored between 180 and 210 b)68% of the responents scored above 120 c)50% of the respondents scored between 120 and 210 d) 96% of the respondents scored between 90 and 210
*Wednesday, November 21, 2012 at 2:52pm by carly*

**Math**

more than is > 840/4 = 210 t>210
*Tuesday, March 12, 2013 at 4:44pm by Dr. Jane*

**Physics (URGENT)**

total R = 210 ohms, so current is 240/210 = 8/7 amps E=IR so if any R is over 100*7/8=87.5Ω it will experience a voltage drop of over 100V.
*Tuesday, September 24, 2013 at 11:01pm by Steve*

**college physics**

(a) use d=vi*t+0.5*a*t^2 manipulate the equation to solve for t 210 m = (23 m/s)t+0.5(0.150 m/s^2)*t^2 t = 9.41 s (b) v = d/t = 210 m/ 9.41 s = 22.3 m/s I'm still trying to figure out the rest...
*Saturday, January 25, 2014 at 2:10am by Lydia*

**math**

C(x) = 9x for x <= 150 = 9*150+6(x-150) for 150 < x < 210 = 9*150 + 6*59 + 3(x-210) for x >= 210
*Wednesday, February 12, 2014 at 9:51pm by Steve*

**algebra**

You could appoach this one of two ways. First, it could be a two equation solution. You know that the product of the two numbers is 210 so your first equation would be x * y = 210 You also know that X and Y will only be one number apart, so your second equation could be y = x...
*Monday, March 29, 2010 at 5:39pm by Anonymous*

**Mat 115**

1155/210 = 5.5 so 1155 is 550% of 210
*Sunday, September 6, 2009 at 9:03pm by Reiny*

**Math**

210-x=100 -x = 100 - 210 x = 110
*Monday, February 21, 2011 at 6:11pm by Ms. Sue*

**precalculus**

a, use sin 45 = cos 45 = 1/sqrt 2 b, use 105 = (1/2) 210 which is 180 + 30 so use sin 210 = -1/2 cos 210 = -sqrt 3/2
*Friday, July 6, 2012 at 2:14am by Damon*

**IT 210 Fundamentals of Programming with Algorithms**

If your seriously looking for help in IT 210 or any other AAIT degree class, then do a search on Google for AxiaTutorials all one word and I guarantee that you will get the answers or help that you need. They have helped me countless times especially with the hard classes like...
*Wednesday, June 24, 2009 at 7:02pm by Paul*

**maths-binomial theorem--plse help**

Hmmm. seems like a pointless waste of time. Any exercise to see whether you understand Pascal's Triangle could involve much less work. Anyway, the coefficients of (1+x)^10 are 1 10 45 120 210 252 210 120 45 10 1 The trailing terms get less and less when x<1, so we just have...
*Friday, December 7, 2012 at 11:53am by Steve*

**math**

A local photocopying store advertises as follows. " We charge 9 cents per copy for 150 copies or less, 6 cents per copy for each copy over 150 but less than 210 , and 3 cents per copy for each copy 210 and above. " Let x be the number of copies ordered and C(x) be the cost of ...
*Wednesday, February 12, 2014 at 9:51pm by Clara*

**Physics please check**

Use the density of water as 210*10^-6 so (210*10^-6)(0.5*10^-3)(90-19) = 7.455*10^-6 or 0.000007455
*Friday, April 13, 2007 at 10:17pm by Summer*

**Algebra Systems with Substitution**

-.35b+210+.75b=360 agree then .40 b + 210 = 360 .40 b = 150 b = 375
*Sunday, January 25, 2009 at 7:45pm by Damon*

**Grade 12 Data Management**

5C4x7C4=175 5C5x7C3=35 175+35=210 There are 210 different combinations.
*Tuesday, September 27, 2011 at 9:11am by bella*

**math**

6 = 2*3 10 = 2*5 14 = 2*7 LCM(6,10,14) = 2*3*5*7 = 210 so, every 210 seconds they will blink at the same time
*Wednesday, October 3, 2012 at 8:48am by Steve*

**logic**

13%+17% = 30% who quit So, 210 were the remaining 70% 210/.7 = 300 13% of 300 = 39
*Friday, January 10, 2014 at 1:48pm by Steve*

**Algebra**

total cost=80*h+210 solve for h. subtract 210 from each side divide each side by 80
*Monday, October 28, 2013 at 4:11pm by bobpursley*

**chemistry**

The subscripts must add up on both sides. The superscripts must add up on both sides. For the first one, You start with Pb-210 and end with Bi=210; therefore, the ? particle must have a mass of zero since 210 + 0 on the right = 210 on the left. For the atomic number, you have ...
*Wednesday, April 6, 2011 at 10:24pm by DrBob222*

**Trig(3 all with work)**

#1 of 1 The cosine of 105 has to be negative because it is in the second quadrant. The same applies to cos 210 in the third quadrant. cos 210 = -(sqrt3)/2 |cos 105| = sqrt[(1/2)(1 - cos 210)] = sqrt[(1/2)(1 - (sqrt3)/2]] For cos 105, a minus sign must be put in front of that ...
*Friday, February 15, 2008 at 3:17am by drwls*

**math**

What is the interest on $600 for 5 years is $210.What is the percentage rate? 600 x rate x 5 yrs = 210. Solve for rate, then multiply by 100.
*Saturday, November 11, 2006 at 6:29pm by nae*

**Maths**

set 1/2n(n+1) = 105 multiply by 2 n(n+1) = 210 n^2 + n - 210 = 0 (n+15)(n-14) = 0 n = -15 or 14, but n has to be a positive integer, so there are 14 terms
*Sunday, September 20, 2009 at 11:17am by Reiny*

**math check**

Round 210,290,290,290.21029 to the nearest ten million 210,300,000,000
*Sunday, February 16, 2014 at 7:37pm by Gio*

**algebra1 HELP PLEASE**

h1(t) = 100 - 0.5*32*t^2. h1 = 100 - 16t^2 = 0 @ gnd. level. 16t^2 = 100 t^2 = 6.25 t = 2.50 s. h2(t) = 210 - 0.5*32*t^2 h2 = 210 - 16t^2 = 0 @ gnd. level. 16t^2 = 210 t^2 = 13.125 t = 3.62 s.
*Monday, July 8, 2013 at 11:13am by Henry *

**Trig**

cscØ = -2 sinØ = -1/2, Ø in III Ø = 210° then tan 210° = 1/√3 (I sketched the right-angled triangle in quad III with sides 1 - √3 - 2, for which you should know the ratios. from the CAST rule I knew that the tangent in III is +
*Tuesday, February 7, 2012 at 8:55pm by Reiny*

**Chemistry H**

60.0 grams of Th-210 with a half life of 50,000 years is allowed to decay for 250,000 years. How much of the original quantity remains? In addition, Th-210 decays via beta emission. Write the equation for its transmutation.
*Thursday, June 20, 2013 at 9:38pm by c*

**MAT 116**

A moon is about 210,000 miles from the planet it orbits. Write in scientific notation. If a rocket traveled at 3 x 10^4 miles per hour, how long would it take for it to reach the moon from the planet? Write the number 210,000 in scientific notation. 210,00 = It would take the ...
*Tuesday, September 25, 2012 at 1:49pm by CC*

**Math - Solving equation (check )**

right. multiply 7 by the denominator, you should get: 7*2sqrt(210t+44t^2) = 210 + 88t 14*sqrt(210t+44t^2) = 210 + 88t then square both sides: 196(210 + 44t^2) = 7744t^2 + 36960t + 44100 8624t^2 + 41160t = 7744t^2 + 36960t + 44100 880t^2 + 4200t - 44100 = 0 44t^2 + 210t - 2205...
*Friday, October 22, 2010 at 5:37am by jai*

**Alebra**

need to solve a word problem using linear equation in slope form. Ben walks 3 miles per hour, and runs at 6 miles per hour. Runs and walks a total of distance of 210 miles per week. Is this correct 210 = 3/6m +b - equation to show relation of hours run to walk B. is Ben runs ...
*Saturday, September 7, 2013 at 7:59pm by aaron*

**geometry**

180 ° - x = 3 * ( 90 ° - x ) - 60 ° 180 ° - x = 270 ° - 3 x - 60 ° 180 ° - x = 210 ° - 3 x - x + 3 x = 210 ° - 180 ° 2 x = 30 ° Divide both sides by 2 x = 15 °
*Saturday, August 25, 2012 at 11:16pm by Bosnian*

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